VOS Pyxis Line: Ocean Carbon Dioxide and Surface Conditions, 2001-2013

Yukihiro Nojiri of Japan's National Institute for Environmental Studies collected this 12-year dataset from the research vessel Pyxis across 16 distinct marine regions. Measurements include the partial pressure of carbon dioxide in both air and seawater, enabling direct calculation of the air-sea CO2 flux. The dataset also contains supporting meteorological and physical oceanographic variables like wind speed, solar radiation, sea surface temperature, and salinity.

Use Cases

• Calculating air-sea CO2 flux based on the measured partial pressure difference.
• Analyzing seasonal and spatial variability of ocean pCO2 across diverse basins.
• Correlating sea surface temperature and salinity with carbon dioxide fugacity.
• Validating regional or global ocean carbon cycle models with in-situ underway data.
• Studying meteorological drivers (wind speed, solar radiation) of surface ocean chemistry.

Strengths

• Covers a 12-year time series from 2001-11-06 to 2013-04-25.
• Includes direct measurements of both atmospheric and aqueous carbon dioxide partial pressure.
• Spatial coverage spans 16 major marine regions from the Bering Sea to the South China Sea.
• Data collection method is specified: Carbon dioxide gas analyzer and shower head chamber equilibrator.

Limitations

• Column names and exact data structure are not provided in any source.
• Row count and file size are unknown, limiting assessment of data volume.
• Sources conflict on the 'last updated' date (2013 vs. 2026), suggesting potential metadata issues.

Provenance

Source

Yukihiro Nojiri, National Institute for Environmental Studies (NIES)

Collection Method

Surface underway observations from the vessel Pyxis, part of the VOS_Pyxis_Line dataset.

Time Range

2001-11-06 to 2013-04-25

Freshness

2026-03-06 00:07:15.529535

Geography

Bering Sea, Caribbean Sea, Coastal Waters of Florida, Coastal Waters of Southeast Alaska and British Columbia, Columbia River estuary, East China Sea, Gulf of Mexico, Gulf of the Farallones, Inland Sea (Seto Naikai), Monterey Bay, North Atlantic Ocean, North Pacific Ocean, Olympic Coast, Papahānaumokuākea, Philippine Sea, South China Sea